versioner: Use llvm::opt::ArgStringList

This commit replaces `clang::driver::ArgStringList` with
`llvm::opt::ArgStringList` because starting from r344398, the alias for
`llvm::opt::ArgStringList` has been removed from the `clang::driver`
namespace.

Note: This is a step to port clang tools to clang-r346389.

See also. https://reviews.llvm.org/rL344398

Bug: 119558057
Test: cd bionic/tools/versioner; mma; ./run_tests.py
Change-Id: I9b5ff572a9af6c6ffaf2c4c9cb01c97f4b85ac22
diff --git a/tools/versioner/src/Driver.cpp b/tools/versioner/src/Driver.cpp
index 8ba3d42..6062240 100644
--- a/tools/versioner/src/Driver.cpp
+++ b/tools/versioner/src/Driver.cpp
@@ -41,6 +41,7 @@
 #include <llvm/ADT/IntrusiveRefCntPtr.h>
 #include <llvm/ADT/SmallVector.h>
 #include <llvm/ADT/StringRef.h>
+#include <llvm/Option/Option.h>
 #include <llvm/Support/VirtualFileSystem.h>
 
 #include "Arch.h"
@@ -168,7 +169,7 @@
   }
 
   const driver::Command& driver_cmd = llvm::cast<driver::Command>(*jobs.begin());
-  const driver::ArgStringList& cc_args = driver_cmd.getArguments();
+  const llvm::opt::ArgStringList& cc_args = driver_cmd.getArguments();
 
   if (cc_args.size() == 0) {
     errx(1, "driver returned empty command for %s", to_string(type).c_str());